<template>
    <div class="cmt-container">
        <h3>发表评论</h3>
        <hr>
        <textarea name="" placeholder="请输入要评论的内容(最多吐槽120字)" maxlength="120" id="" v-model="msg"></textarea>
        <mt-button type="primary" size="large" @click="postComment">发表评论</mt-button>
        <div class="cmt-list">
            <div class="cmt-item" v-for="(item,i) in comments" :key="item.id">
                <div class="cmt-title">
                    第{{i+1}}楼&nbsp;&nbsp;用户:{{item.user_name}}&nbsp;&nbsp;发表时间:{{item.add_time | dateFormat}}
                </div>
                <div class="cmt-body">
                    {{item.content === 'undefined' ? '此用户很懒什么也没说' : item.content}}
                </div>
            </div>
        </div>
        <mt-button type="danger" size="large" @click="getMore">加载更多</mt-button>
    </div>
</template>

<script>
    import { Toast } from 'mint-ui'
    export default {
        data() {
            return {
                pageIndex : 1,//默认展示第一页
                comments:[],//所有评论数据
                msg:''//评论输入的内容
            }
        },
        created(){
            this.getComments()
        },
        methods: {
            // 获取评论
            getComments() {
                this.$http.get('api/getcomments/' + this.id + '?pageindex=' + this.pageIndex).then(result=>{
                    if(result.status == 200){
                        this.comments = this.comments.concat(result.body.message)                       
                    }else{
                        Toast("获取评论失败")
                    }
                })
            },
            // 加载更多
            getMore(){
                this.pageIndex++;
                this.getComments();
            },
            // 发表评论
            postComment(){
                if(this.msg.trim().length == 0 ){
                    return Toast('评论内容不能为空')
                }
                this.$http.post('api/postcomment/' + this.$route.params.id,{ content:this.msg.trim()}).then(result=>{
                    if(result.body.status === 0){
                        var cmt = {
                            user_name:'匿名用户',
                            add_time:Date.now(),
                            content:this.msg.trim()
                        };
                        this.comments.unshift(cmt);
                        this.msg = ''
                    }
                });
            }
        },
        props: ['id']
    }
</script>

<style lang="scss" scoped>
    .cmt-container {
        h3 {
            font-size: 18px;
        }

        textarea {
            font-size: 14px;
            height: 85px;
            margin: 0;
        }

        .cmt-list {
            margin: 5px 0;

            .cmt-item {
                font-size: 13px;

                .cmt-title {
                    background: #ccc;
                    line-height: 30px;
                }

                .cmt-body {
                    line-height: 35px;
                    text-indent: 2em;
                }
            }
        }
    }
</style>